Pneumatic tool.



PATENTED AUG. 25, 1903.

Nolssmov.

W." H. KELLER; PNEUMATPO man. APPLICATION BIL'EDJAN. 1a, 1905.

2 SHEETS-SH-BET 1.

No. 897,107. A PATENTED AUG. 25, 190s.v

- W. H. KELLER.

PNEUMATIC TOOL.

APPLIGATION'IILED JAN. 13, 1905.

' 2 SHEETS-SHEET 2.

. broadly of the novel construction, location.

UNITED srA'rEs PATENT ornren WILLIAM H. KELLER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO CHICAGO PNEIL MATIC TOOL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

PNEUMATIC rooL.

To an whom "it may concern:

Be it known that I, VILLIAM II. KELLnn,a .c1t1zen of the United States, residing in the 'city' and county of Philadelphia, State of Pennsylvania, have invented a new and useful Handle for Pneumatic Tools, of which the following is a specification;

In a prior patent granted tome January 17, 1905, No. 780,354, I have shown, described, and claimed, a type of pneumatic tool handle embodying a chambered handle having a head-block provided also with a chamber into which the upper portion of the throttle valve is adapted to project, said throttle valve being adapted to be operated by either the thumb or finger of the operator.

In my present invention 1 have described and claimed broadly, a lever suitably fulcrumed and adapted to be manually operated by the thumb or finger of the operator. In my prior patent I have shown the thumboperated lever ashaving its lower portion projecting through the bottom of the neck containing it, whereas in my present invention Ishow the lever as having its extension wholly contained within the head-block chamber and the hollow neck joining the handle proper to the head-block.

In my prior patent above referred to I have claimed broadly, a valve actuating device and lever suitably fulcrunied, whereas in my present-application 'I do not desire to be limited to a lever, but contemplatethe use of any Inanually'operated device located in such a position as to" be readily manipulated-by the thumb or finger of the operator.

. To the above ends my invention consists and arrangement of a throttle valve and its adjuncts, said valve being Wholly outside of the handle of the pneumatic tool or .its grasping portion and operated. by any suitable or convenient manually actuated device in sliding or similar contact with said throttle valve.

The invention. further consists of other novel features of construction, all as will be hereinafter fully set forth.

Figure 1 represents a perspective View of a neumatic tool handle, and its adjuncts emodying my invention. Fig. 2 re resents a sectionalview of Fig. '1, certaino the parts being shown melevation;

Specification of Letters Patent.

Application filed January 13, 1905.

Patented hug. 25, 1908.

Serial No. 240,876.

, Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings, 1 designates the head-block of a pneumatic tool having the coupling sleeve 2 attached thereto, said coupling sleeve being preferably integral with said head-block.

3 designates the handle proper, the same comprising the grasping. part having the chamber 4. therein, said handle or grasping part being connected to the head-block by means of the upper neck 5 and said headblock having the upper chamber {5 therein, which communicates with the chamber 4 by means of the passage 2 The lower portion of the handle is 'joined to the head-block by means of a neck 8, which n'iay be omitted if desired. I

9 designates the inlet for the motive lluid, the latter passing into the duct 10 which, it will be noted, is located wholly outside of the handle 3 or its grasping portion, as Well as outside ofthe neck 8, said duct discharging into the passage, .11 in which located. the" bushing 12 having the upper and. lower parts 13 and 14, said inishing being preferably screwed or driven into the head-block as in 80 dicated in 2 and 3, although, if desired, it may be secured. therein by other suitable or equivalent means.

. 14 designates thethrotltle valve, the same consisting of the heads 15 and 16 joined by the neck 17, it being apparent that said head 16 controls the how of the motive fluid through the passage 11, the throttle valve being shown in F i 2 as in depressed or open position and in *ig. 3 as in. its uppermost or 90 closed. position.

18designates a spring contained in the lower portion of the throttle valve bushing,

pointZf-i and is provided with the thumb. or

nger plece 24.

2 5 designates a cam face which may abut against the wall 26 when thevalve is in its uppermost. position.

27 x designates the slit in the rear upper wall of the handle in which is fulcrumed the lever 22, the latter having a curved or areshaped face 27 to whose contour corresponds the cut or slit 28 in the upper portion of the neck 5, it being understood from Fig- 2 that the arcs for the cuts 27 and 28 are struck from the common center 23 so that underali conditions the slit 27 is closed in whatever position the throttle valve or the operating lever may be, so that the liability of dirt, sand or other deleterious substances entering the handle are completely obviated.

It will be apparent that in my invention the throttle valve, which in the present instance has a plurality ofheads joined by a neck, is preferably contained within a suitable bushing which is contained within the head-block which constitutes no part of the handle or the grasping portion 3.

In my invention'the chamber 4 Within the handle is employed partly for the purpose of lightness and partlyfor the purpose of providing a receptacle for the valve operating device 22, it being apparent that the valve.

. operating device is provided'with an extenwith the top of the valve.

[ent from Fig. 2.

sion Which terminates in proximity to the top of the throttle valve, said extension and head being located within the head-block chamber 1 It will be apparent'that in my invention the throttle valve and its adjuncts always re main the same and that the valve has the constant pressure of the spring .18 or'its equivalent, forcing it upwardly and being opened or moved downwardly by the downward movement of the head 20 contacting When the valve is closed an improper; movement or displacement o' the valve'is prevented by the contact of the head 20 with the topwall of the head-block cl1amber 6, as will be appar- It will be a parent that to equi p the handle With a thum or finger operated device or to change from one device to the other, no change is necessary in the handle, throttle valve or its adjuncts other than the mere mechanical slitting ofthe handle casing and the assembling of the various parts. So far as I am aware, I am the first in the art to con-v struct a handle andits adjuncts so proportionedand chambered that either a thumb or finger operated device can be applied at will without necessitating any change in the construction location or manner of operation of the throttle valve or of the handle proper and my elaimsto this feature are, therefore 'to be interpreted with corresponding scope.

It will be apparent that the form and construction of the throttle valve, which is preferably a balanced valve, may be changed if desired, without departing from the spirit of my invention, and that the extremity of the extension 21 may, if desired, have a mechanical connection with the valve. I de sire to call especial attention to the efficiency ofthe form of handle and its adjuncts seen in Figs. 1 and 2, since it will be seen that the entire handle and head-block is completely 1 closed, except for the slit 27 which is completely closed by the operating device 22, when the parts are assembled/ It will also be apparent that instead of the closed or spade handle shown, I may employ a pistol grip or other'form of handle.

Various other changes may be made'by those skilled inthe art and I do not therefore desire to be limited in every instance to .the exact construction herein shown and described.

'; 1, Having thus described my invention, What I' 'claim as new and desire to secure by-Letters Patent is 1. In a device of the character named, a grasping handle, a head-block to which said handle is secured, a transverse chamber in one end of said head-block, a transversely extending throttle valve located in said head'- block and having one end projecting into said chamber and an actuating device for said-valve having one portion adapted for manual operation and the other end extends ing towards said head. block chambe r and adaptedto actuate said throttle valve, the pressure being applied intermediate the pivot of said device and its point of ap'plication.

2.. In a device'of thecharaeter named, a head-block, a transverse chamber in the latter, a throttle valve extending transversely ofsa'id head-block, said valve having constant pressureon one end thereof, the oppo site end terminating insaid chamber, a, w

manually operated device fulcrumed in proximity to said chamber and an extension on said device located in said chamber, said ex; tension being in sliding contact with an end of said valve, and said valve 'being'adapted and in sliding contact therewith, said valve being adapted to be actuated by a thumb or finger of the operator, the pressure being applied intermediate said head and the fulcrum of said device.

4. In a device of the character named, a grasping handle, having a chamber therein, a head block to which said handle is secured, a longitudinal chamber in the upper portion of said head-block in communication with the chamber in said handle, a throttle valve located in said head-block, means for operating said throttle valve in one direction by constantpressure and a manually-operatedlever having an end contained in said headblock chamber and bearing on said throttle valve for actuating the latter in an opposite direction, the pressure on'said lever being applied intermediate its fulcrum and said en 5. The combination of a grasping handle, a head-block having said handle secured thereto, a throttle. valve in said head-block and extending transversely thereof, a longitudinally extending chamber in said handle and grasping portion, said chamber being continued through the. upper portion of said handle and terminating in the upper ortion of said head-block, said throttle valve aving its u per extremity projecting into the headblock chamber and a manually-operated device having an extension adapted to contact with an end of said throttle valve, the latter being adapted to be actuated in one direction by constant pressure and in the other direction by said.manually-operated device, and the pressure on said device being applied intermediate its fulcrum and said extension. I

6. In a device of the character described, a head-block, a transverse chamber therein, the upper portion of said chamber being closed, a throttle valve in said head-block, said valve having constant pressure on one end thereof, the opposite end terminating in said chamber, a. handle attached to said head-block, achamber in said handle communicating with said transverse head-block chamber, and an actuating device located in said chamber, and having one end bearing on said valve and the other end adapted to be manually-operated, the pressure on said device being applied intermediate its fulcrum and said end.

7. In a device of the character named, a head-block, a chamber therein, the upper portion of said chamber being closed, a

'SUP

throttle valve in said head-block, said valve having constant pressure on one end thereof, its opposite end terminating in said chamber, a handle attached to sald head-block, a chamber in said handle communicating with said head-block chamber, said handle being connected to said head-block by a solid neck closed at top and bottom, and an actuating device in said chambers and having one end bearing on said valve and a portion intermediate saidend and the fulcrum of said device adapted to be manually operated, in combination with means for limiting the movement of said actuating device in either direction.

8. In a device of the character named, a head-block, a transverse chamber therein,

the upper portion of said chamber beingclosed, at' its top a throttle valve in said head-block, said valve having constant pressure at one end thereof, and its 0 posite end terminating in said chamber, a andle attached to said head-block, a chamber in said handle communicating with said transverse head-block chamber, an actuating lever located in said chambers and having one end bearing on said valve and the other end suitably fulerumed and a slit in said handle through which a portion of said lever projects, the latter having its upper portion arc-sha ed and the u per portion of thc slit in said fiandle being also arc-shaped, said are being struck from the axis of said lever.

9. As an improved article of manufacture, a pneumatic tool handle comprising a grasping portion having a chamber thereinfclosed at its bottom and sides, a head-block having a head-block chamber therein closed at its top, a neck joining the upper part of said handle to said head-block chamber, the u per and lower walls of said neck being c osed, said head-block having a pressure ly duct for the inlet of the motive fiuu extending into its lower portion and located outside of said handle and its grasping portion, said head-block chamber and handle chamber being adaptedrespectively for therece tion of an actuating device and said head-b ock chamber being adapted for the reception of a throttle valve and its adjuncts.

WILLIAM H. KELLER.

Witnesses:

JoHN A. WIEDERSHEIM,

E. HAYWARD FAIRBANKS. 

